/*
 * Copyright (c) JoinQuant Development Team
 * Author: Huayong Kuang <kuanghuayong@joinquant.com>
 */

#include <iostream>

using namespace std;

string toUpper(string str) {
    for (auto & c: str) c = toupper(c);
    return str;
}


int main(void)
{

    string str = "STriNg oF mIxID CasE lETteRS";
    cout << "ToUpper: " << toUpper(str) << endl;
    cout << "Origin: " << str << endl;

    return 0;
}

